Anchor extension means



Dec. 3l', 1946.

J. E. ANDERSON El AL ANCHOR EXTENSION MEANS Filed Sept. '7

I'NVENToRs. Qfokn/ E Qndensom Patented Dec. 31, 1946 f agrarias- ANCHOR EXTENSION MEANS 4John E. Anderson'and Charles W, Dunlap, Chicago, Ill., Aassignors to Plibrico. Jointless-Firebrick Company, Chicago, Il l., a corporation of Iliinois lApplication September 7, 1944, `S,el.i,al'No.v5`5w2,990

4 Claims.

This-invention relates to wall `structures and hasito dorwith means for -anchoring a refractory lining -gwall to aretaimng wall in yfurnaces and analogous structures.

"In vPatent No. 2,183,712, issued December 19, 1939, vto Charles W. Dunlap, for Wall anchor, there is disclosed anchoring means for securing a lining lto a retaining wall while permitting eX- pansion .and-contraction of the lining in all directions `in the plane thereof independently of the yretaining wall. The anchoring means referred to comprises an outer anchor member secured in the retaining wall, and an inner anchor member embedded in the lining wall andconne'cted to the outer member by means permitting expansion and contraction of the lining wall in the manner stated. The inner anchor member is spaced outward a considerable distance from the inner face of the refractory lining wall. This anchoring means has proved to be highly efficient in most cases, but there are exceptional cases where additional anchorage is required. If the-refractory lining wall is subjected to excessively high temperatures, or, when initially installed, is fired Very rapidly Without being allowed a sulicient period of time for thorough drying out, deep spalling of the lining wall is apt to occur, In such cases, we have found,` it is possible to prevent or reduce materially deep spalling of the lining Wall by-provi'ding anchoring means therefor which extends to, or substantially to, the inner face of the lining wall. Our invention is directed to the provision of such anchoring means and to the provision o an anchor extension member particularly suitable for that use. Further objects and advantages of our invention will appear from the detail description.

In the drawing:

Figure 1 is a plan view of wall anchoring means embodying our invention;

Figure 2 visza fragmentary vertical sectional view through a furnace wa11,:comprising an outer retaining wall and an inner refractory lining wall anchored to the retaining wall by the anchoring means of our invention; and

Figure 3 is a fragmentary inner face view of the wall structure of Figure 2.

The anchor assembly shown in Figure 1 comprises an outer anchor member 5 and an inner anchor member 6 connected together at 'l in a manner permitting movement of member 6 in all directions in a vertical plane relative to member 5. The latter member is secured in an outer retaining Wall 4 of masonry construction, and member 6, provided at its inner end with two opposedarms v81defningbetWeen them a substantially-elliptical space'open fand reduced or restricted at its inner side, is embedded in a lining wall 9 erected at the-inner-iace of wall 4, the

inner-end of anchor member 6 being spaced al considerable-distance from the linner iaceof Wall 9. The latter-wall-isshown as a monolithic refractory wall which vmay be built up 'from pieces or lumps of plastic material which .are pounded together, the lining wall being built inward from the inner -face vof retaining wall 4. Thematerial ot the` lining,-in iplastic condition, is built around the inner anchor member 6, it being understood that a suitablenumber yof anchors is provided spaced appropriately. Thelining wall 9 may be of any other vappropriate construction, within the broadenconceptfof our invention. The anchor membe-rsl-fand, including the connection therebetween,..are the sameas the anchor means disclosed in the above .identified patent and need not be here described in greater detail.

As has been noted, the inner end of the inner anchor member l :is spaced a considerable distance from theinnerface of the lining wall 9. In -order that the inner portion of wall 9 may f loe-effectively .anchoredin a manner to prevent or reduce-deep spalling, .Weprovide an extension anchor member-adapted to be attached tothe inner anchor member'l `andextend therefrom to the inner-face oflwall-i), Yor substantially so. f This inner-anchor member, designated by the reference-number l0, comprisesan inner end or body portion I-I, :which iscubiform and'from which extends a neck I'2, preferably of the same thickness' as body-I I fand tapering in width outwardly therefrom, this neck being provided at its outer end with arelativel-y .enlargedhead I3 of substantially elliptical shape in plan. Head I3 is ofv-asize to't'between arms vof anchor member 6, -vwith the' smallervvend of neck I2 passing through the opening at the inner side ofthe space defined by arms 8, and the anchor extension member I0 extending inward with its inner end or face flush with the inner face of wall 9, as shown in Figures 2 and 3. It will be noted that the sides of neck I2 are joined to the sides of body I l by rounded areas I4 which merge smoothly into the sides of the body and into the sides of the neck. Also, the sides of the neck are joined to the head I'3 by rounded areas I5 merging smoo'thlyinto the head and into the sides Aof the neck. The body Il and neck I2 and head I3 preferably are of the same thickness, such that the anchor extension member I0 projects a material distance above and below arms 8 ofthe inner anchor member 6, as shown in Figure 2. Since the member I is embedded in wall 9, with the head I3 engaging between arms 8 of member 6, an effective anchorage is provided between member 6 and wall 9 which,`in conjunction with the connection between the inner anchor member 6 and the outer anchor member 5, restraining member 6 against-inward movement, assures effective anchorage for the inner portion of wall 9, preventing deep spalling thereof. As above noted, in practice a considerable number of the anchoring means shown in Figure 1 may be utilized in a wall structure, properly spaced to accomplish the desired results. Each of the anchor extension members Iii is effective for preventing deep spalling of wall 9 in a considerable area extending about member I0, and by proper spacing of the anchoring means deep spalling of wall 9 may be prevented or materially reduced. The particular shape of the anchor extension member Il) is of importance as avoiding sharp corners within the wall 9, such as might tend to cause cracking thereof, and the inward are of neckzl2 provides effective anchorage for member lil in wall 9, of a character to restrain the inner portion of this wall against inward movement, which is conducive to preventing or reducing deep spalling. The anchor extension member Ii) is .made of refractory material, as noted, preferably of the same material as the lining wall 9, and should have a coefficient of expansion the same as, or not materially different than, that of the material of wall 9.

It will be'understood that changes in detail of construction and arrangement of parts of our invention may be resorted to without departing from the field and scope thereof, and We intend to include all such variations, as fall within the scope of the appended iclairns, in this application in which the preferred form only of our invention has been disclosed.

We claim:

1. In a furnace construction, a retaining wall, a monolithic refractory lining wall at the inner face of said retaining wall, an outer anchor member secured in said retaining wall, an inner anchor member embedded in said lining wall lying wholly therein and connected to said outer anchor member by means permitting expansion and contraction of said lining wall in all directions in the plane thereof independently of said retaining wall, the inner end of said inner anchor member being spaced outward from the inner face of said lining wall, and a refractory anchor extension member embedded in said lining wall attached at its outer end to said inner anchor member and extending inward therefrom substantially to the inner face of said lining wall.

2. In a furnace construction, a retaining wall, a monolithic refractory lining wall at the inner face of said retaining wall, an outer anchor member secured in said retaining wall, an inner anchor member embedded in said lining wall lying Wholly therein and connected to said outer anchor member by means permitting expansion and contraction of said lining wall in all directions in the plane thereof independently of said retaining Wall, the inner end of said inner anchor member being spaced outward from the inner face of said lining wall and shaped to provide spaced apart arms dening between them a space open and relatively restricted at its inner side, and a refractory anchor extension member having at its outer portion a reduced neck and a head thereon disposed between said arms with said extension member extending therefrom inward to the inner face of said lining wall.

3. In a furnace construction, a retaining wall, a monolithic refractory lining wall at the inner face of said retaining wall, an outer anchor member secured in said retaining wall, an inner anchor member embedded in said lining Wall lying wholly therein and connected to said outer anchor member by means permitting expansion and contraction of said lining wall in all directions in the plane thereof independently of said retaining wall, the inner end of said inner anchor member being spaced outward from the inner face of said lining wall and shaped to provide spaced apart arms denning between them a space of substantially elliptical shape in plan open and restricted at its inner side, and a refractory anchor extension ,member having at its outer portion a reduced neck and a substantially elliptical head thereon disposed between said arms with said extension member extending therefrom inward to the inner face of said lining wall.

4. In a furnace construction, a monolithic retaining wall, a refractory lining wall at the inner face of said retaining wall, an outer anchor member secured in said retaining wall, an inner anchor member embedded in said lining wall lying wholly therein and connected to said outer anchor member by means permitting expansion and contraction of said lining wall in all directions in the plane thereof independently of said retaining wall, the inner end of said inner anchor member being spaced outward from the inner face of said lining wall and shaped to provide spaced apart arms defining between them a space of substantially elliptical shape in plan open and restricted at its inner side, and a refractory anchor extension member comprising a substantially cubiform inner body portion having an outwardly tapering neck provided at its outer end with a substantially elliptical head, said head being disposed between said arms with said neck extending through the open side of said space and said extension member extending to the inner face of said lining Wall.

JOHN E. ANDERSON. CHARLES W. DU'NLAP. 

